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Title: A PEG assisted sol-gel synthesis of LiFePO{sub 4} as cathodic material for lithium ion cells

Abstract

In order to obtain fine-particle LiFePO{sub 4} with excellent electrochemical performance, LiFePO{sub 4}/C powders were synthesized by a poly(ethylene glycol) (PEG) assisted sol-gel method. All samples were characterized by X-ray powder diffraction and scanning electron microscopy, and their electrochemical properties were investigated by cycle voltammograms and charge-discharge tests. The sample, synthesized with the n {sub PEG}/n {sub LFP} = 1:1 under sintering temperature of 600 deg. C, possesses the global morphology and particle size of about 100 nm. This sample delivers the first discharge capacity of 162 mAh g{sup -1}, i.e. 95.3% of the theoretical capacity, at the 15 mA g{sup -1} discharge current between 2.5 and 4.0 V (versus Li/Li{sup +}). The sample also displays a robust rate capability and stable cycle-life. The improved electrochemical performance originates mainly from the fine particle of nanometric dimension, regular global morphology and uniform dispersing in the product as well as the increased electronic conductivity by carbon coating.

Authors:
 [1];  [1];  [2];  [3]
  1. College of Chemistry, Sichuan University, Chengdu, Sichuan 610064 (China)
  2. College of Chemistry, Sichuan University, Chengdu, Sichuan 610064 (China). E-mail: laiqy5@hotmail.com
  3. Analytical and Testing Center, Sichuan University, Chengdu, Sichuan 610064 (China)
Publication Date:
OSTI Identifier:
21000636
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal Issue: 5; Other Information: DOI: 10.1016/j.materresbull.2006.08.018; PII: S0025-5408(06)00347-3; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CARBON; ELECTROCHEMISTRY; INORGANIC COMPOUNDS; IONIC CONDUCTIVITY; LITHIUM IONS; MORPHOLOGY; PARTICLE SIZE; PERFORMANCE; POLYETHYLENE GLYCOLS; SCANNING ELECTRON MICROSCOPY; SINTERING; SOL-GEL PROCESS; X-RAY DIFFRACTION

Citation Formats

Xu Zhihui, Xu Liang, Lai Qiongyu, and Ji Xiaoyang. A PEG assisted sol-gel synthesis of LiFePO{sub 4} as cathodic material for lithium ion cells. United States: N. p., 2007. Web.
Xu Zhihui, Xu Liang, Lai Qiongyu, & Ji Xiaoyang. A PEG assisted sol-gel synthesis of LiFePO{sub 4} as cathodic material for lithium ion cells. United States.
Xu Zhihui, Xu Liang, Lai Qiongyu, and Ji Xiaoyang. Thu . "A PEG assisted sol-gel synthesis of LiFePO{sub 4} as cathodic material for lithium ion cells". United States. doi:.
@article{osti_21000636,
title = {A PEG assisted sol-gel synthesis of LiFePO{sub 4} as cathodic material for lithium ion cells},
author = {Xu Zhihui and Xu Liang and Lai Qiongyu and Ji Xiaoyang},
abstractNote = {In order to obtain fine-particle LiFePO{sub 4} with excellent electrochemical performance, LiFePO{sub 4}/C powders were synthesized by a poly(ethylene glycol) (PEG) assisted sol-gel method. All samples were characterized by X-ray powder diffraction and scanning electron microscopy, and their electrochemical properties were investigated by cycle voltammograms and charge-discharge tests. The sample, synthesized with the n {sub PEG}/n {sub LFP} = 1:1 under sintering temperature of 600 deg. C, possesses the global morphology and particle size of about 100 nm. This sample delivers the first discharge capacity of 162 mAh g{sup -1}, i.e. 95.3% of the theoretical capacity, at the 15 mA g{sup -1} discharge current between 2.5 and 4.0 V (versus Li/Li{sup +}). The sample also displays a robust rate capability and stable cycle-life. The improved electrochemical performance originates mainly from the fine particle of nanometric dimension, regular global morphology and uniform dispersing in the product as well as the increased electronic conductivity by carbon coating.},
doi = {},
journal = {Materials Research Bulletin},
number = 5,
volume = 42,
place = {United States},
year = {Thu May 03 00:00:00 EDT 2007},
month = {Thu May 03 00:00:00 EDT 2007}
}